Bar-stock guide arrangement for a swiss-type automatic lathe



.1521 US. c1.

United States Patent 1111 31,541,904

[72] Inventor Charles Gurtner [51 Int. CL... 'B23b 25/00 Moutier,Switzerland [50] Field of Search; 82/38. I 38, 211 App]. No. 814,699'912,913; 2,l4/l.l, 1.5

22] Filed April 9 1969 E45] Patented Nov. 24 1970 References Cited [73]Assignee Fabriquede Machines Andre Bechler S.A. NIT STATES PATENTS MomieBern. Switzerland 2,619,712 12/1952 Bechler et al 82/912X Priority April19,1968 2,9l5,8l0 12/1959 Taylor et al s2/3sx gi zz ga gfi PrimaryExaminer- Leonidas Vlachos I l 1 v Attorney-Me Nenny, Farrington, Pearneand Gordon ABSTRACT: The bar-stock 'guide housing is divided into upperand lower parts, the upper part being free to swing upwards, permittingthe housing to be opened up for sideways loading of the bar stock.

Patented Nov. 24, 1970 Sheet Patented Nov. 24, 1970 v 3,541,904

Sheet 2 0r 2 BAR-STOCK GUIDE ARRANGEMENT FOR A SWISS- TYPE AUTOMATICLATHE BACKGROUND OF THE INVENTION The invention relates to a bar-stockguide arrangement on a Swiss-type automatic lathe, including a tubularhousing, a plurality of supporting rods within the housing and extendinglengthwise thereof, and a plurality of elastic bar-stock guides mountedon the rods and spaced along the lengths thereof.

SUMMAR-Y'OF THE INVENTION An object of the invention is an improvedguide arrangement of this kind which is quieter in operation and moreeasily used.

This object and others of the invention will be apparent from thefollowing detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS DESCRIPTION OF THE PREFERREDEMBODIMENT The illustrated bar-stock guide arrangement, for use on aSwiss bush-type automatic screw machine, comprises a tubular housingthat is cross-sectionally divided into an upper part 1 and a lower part2. These two parts have a U-shaped cross section, as shown in FIGS. 2and 3. I

The lower part 2 is fastened to supports 3; .and the upper part 1 isfixed to swivel arms 4, of which only one is shown. These arms are somounted on pivot pins 5, fixed to the supports 3, that the upper part 1can swing upwards about an axis parallel to the longitudinal axis of thehousing.

A series of support pieces 6 are simply placed in the upper part 1.Fastening pieces 7 are fixed in the upper 'part by individual screws 8,which also serve to attach the arms 4 to the housing upper part 1. Twosupporting rods 9 extend along the length of the housing through-holesin the parts 6 and 7. The portions of these rods between the parts 6 and7 hold the ends of elastic bar-stock guides 10. These guides have anarcuate middle section, as seen in FIG. 2, and are advantageously in- 5jection molded and made-from a glass-fiberstrengthened polyamide'. 1

Similar supporting rods 90, support pieces 6a, and fastening pieces 7aare provided in the housing lower part 2 and positioned opposite thecorresponding parts 6, 7 and 8.

The usual bar-stock ram, incorporating a flag 12 on its rear end, isindicated by the reference number 11.

Each pair of guides and 10aforms a portion of a straight bar-stock guidechannel, which can be opened up, because the housing upper part 1, alongwith the parts it holds, is free to swing upwards, permitting thebar-stock to be loaded sideways (rather than longitudinally,.as atpresent) into the guide channel.

housing in cross section is divided into upper and lower parts,

said upper part being free to swing upwards with respect to said lowerpart for opening up said housing and the bar-stock guide channelandpermittmg sideways loading thereof with bar-stock, and wherein saidsupporting rods and said elastic guides are divided in number betweensaid housing upper and lower parts, and said-elastic guides therein arepositioned opposite each other.

2. The bar-stock guide arrangement as defined in claim 1, wherein saidsupporting rods and elastic guides are equally divided in number betweensaid housing upper and lower parts and those said rods and guides insaid housing upper part move therewith when the latter swings upwards.

